| 摘要 |
1,199,730. Separating fats. UNILEVER Ltd. 8 Nov., 1967 [10 Nov., 1966], No. 50419/66. Heading C5C. A method of fractionating a composition comprising an intimate mixture of fatty materials such that at the fractionating temperature part of the composition is solid and the remainder is liquid and of different specific gravity from the solid part, comprises making a flowable mixture of the composition with an aqueous liquid capable of wetting the materials but without substantial solvent action thereon and having a s.g. at the fractionating temperature between that of the solid and that of the liquid, and separating the constituents by virtue of the different s.g.'s, e.g. by centrifuging. The aqueous medium may be an aq. solution of NH 3 of s.g. at 20‹ C. 0À85-0À99, and the fatty composition may be dispersed therein to form the flowable mixture. The aq. NH 3 solution may form an ammonia soap wetting agent by reaction of the fatty acid present and part of the NH 3 . Examples describe the fractionation of palm oil, coconut oil and palm kernel oil into olein and stearin fractions. As a preliminary step a liquid mixture may be cooled to a temperature at which crystallization of a higher melting fraction occurs preferably before admixture with the aqueous liquid. |
